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Anritsu MG3641A Manual De Usuario

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SECTION 7   PERFORMANCE TEST
7-9
(4) Test procedure
STEP
                                                      PROCEDURE
FM deviation
1.
Set the MG3641A/MG3642A output level to +7 dBm.
2.
Set the MG3641A/MG3642A frequency and modulation analyzer receive frequency to the
expected frequency.
3.
Turn on the MG3641A/MG3642A FM, and set Source to Int1 1 kHz.
4.
Set the MG3641A/MG3642A FM frequency deviation.
5.
Read the indicator of the modulation analyzer.
6.
Change the MG3641A/MG3642A FM frequency deviation and repeat the measurement.
FM distortion
7.
Set the MG3641A/MG3642A FM frequency deviation to 3.5 kHz or 22.5 kHz.
8.
Measure the demodulation output of the modulation analyzer using the distortion meter.
(5) Note on test
• The demodulation zone of the modulation analyzer must be within 0.3 to 3 kHz at measurement of the FM
deviation and 0.3 to 15 kHz or 0.3 to 20 kHz at measurement of distortion rate.
• Using a modulation analyzer with much residual FM affects the measurement of distortion if the FM deviation
rate is lower.  Use a modulation analyzer with a little residual FM.